Genuine Hyundai (28113-2P100) Air Filter

2011 hyundai sonata air filter | eBay

I just googled 2011 hyundai sonata cabin air filter and it listed a bunch of places. However, rule of thumb is to change the cabin air filter every 15K miles. I know the dealer is doing it for free, but changing it at 3K seems a bit crazy. If it really is dirty enough to change, I would ask the dealer if it is symptomatic of a bigger issue.

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